WRID>RIFF-WAVE>LIST-INFO

DRAFT!

TODO: overview

The LIST chunk is a container which holds additional subchunks of list_type. This page is about the INFO variant.

The ‘INFO’ list is a registered global form type that can store information that helps identify the contents of the chunk [ed: 'chunk' refers to the whole WAVE file in this case]. This information is useful but does not affect the way a program interprets the file; examples are copyright information and comments. An ‘INFO’ list is a ‘LIST’ chunk with list type ‘INFO’.
[RIFF1991]

...

`LIST-INFO` chunk

Chunk	Name	Bytes	Type	condition	WRID
LIST-INFO	`id`	`4`	`u8[4]`	`id = LIST`	...>id
LIST-INFO	`size`	`4`	`u32`		...>size
LIST-INFO	`list_type`	`4`	`u8[4]`	`list_type = INFO`	...>list_type

Example chunk

TODO: info about subchunks... example subchunk:

Chunk	Name	Bytes	Type	condition	Description	WRID
ICMT	`id`	`4`	`u8[4]`	`id = ICMT`		...>ICMT>id
ICMT	`size`	`4`	`u32`			...>ICMT>size
ICMT	`text`	`size`	`ZSTR`		Comments. Provides general comments about the file or the subject of the file. If the comment is several sentences long, end each sentence with a period. Do not include newline characters.	...>ICMT>text

All of the subchunks are the same format, with only the id changing between them.

The name text is a placeholder made up for this reference book. [RIFF1991] doesn't actually name the data portion of the INFO subchunks, probably because the entire data portion is a single ZSTR.

...

An ‘INFO’ list should contain only the following chunks. New chunks may be defined, but an application should ignore any chunk it doesn't understand. The chunks listed below may only appear in an ‘INFO’ list. Each chunk contains a ZSTR, or null-terminated text string.
[RIFF1991]

INFO subchunks

Defined in [RIFF1991]

Chunk	Description	Specification
IARL	Archival Location. Indicates where the subject of the file is archived.	RIFF1991
IGNR	Genre. Describes the original work, such as "landscape", "portrait", "still life", etc.	RIFF1991
IKEY	Keywords. Provides a list of keywords that refer to the file or subject of the file. Separate multiple keywords with a semicolon and a blank. For example, "Seattle; aerial view; scenery".	RIFF1991
ILGT	Lightness. Describes the changes in lightness settings on the digitizer required to produce the file. Note that the format of this information depends on hardware used.	RIFF1991
IMED	Medium. Describes the original subject of the file, such as "computer image", "drawing", "lithograph", and so forth.	RIFF1991
INAM	Name. Stores the title of the subject of the file, such as "Seattle From Above".	RIFF1991
IPLT	Palette Setting. Specifies the number of colors requested when digitizing an image, such as "256".	RIFF1991
IPRD	Product. Specifies the name of the title the file was originally intended for, such as "Encyclopedia of Pacific Northwest Geography".	RIFF1991
ISBJ	Subject. Describes the contents of the file, such as "Aerial view of Seattle".	RIFF1991
ISFT	Software. Identifies the name of the software package used to create the file, such as "Microsoft WaveEdit".	RIFF1991
ISHP	Sharpness. Identifies the changes in sharpness for the digitizer required to produce the file (the format depends on the hardware used).	RIFF1991
IART	Artist. Lists the artist of the original subject of the file. For example, "Michaelangelo".	RIFF1991
ISRC	Source. Identifies the name of the person or organization who supplied the original subject of the file. For example, "Trey Research".	RIFF1991
ISRF	Source Form. Identifies the original form of the material that was digitized, such as "slide", "paper", "map", and so forth. This is not necessarily the same as IMED.	RIFF1991
ITCH	Technician. Identifies the technician who digitized the subject file. For example, "Smith, John."	RIFF1991
ICMS	Commissioned. Lists the name of the person or organization that commissioned the subject of the file. For example, "Pope Julian II".	RIFF1991
ICMT	Comments. Provides general comments about the file or the subject of the file. If the comment is several sentences long, end each sentence with a period. Do not include newline characters.	RIFF1991
ICOP	Copyright. Records the copyright information for the file. For example, "Copyright Encyclopedia International 1991." If there are multiple copyrights, separate them by a semicolon followed by a space.	RIFF1991
ICRD	Creation date. Specifies the date the subject of the file was created. List dates in year-month-day format, padding one-digit months and days with a zero on the left. For example, "1553-05-03" for May 3, 1553.	RIFF1991
ICRP	Cropped. Describes whether an image has been cropped and, if so, how it was cropped. For example, "lower right corner". IDIM Dimensions. Specifies the size of the original subject of the file. For example, "8.5 in h, 11 in w".	RIFF1991
IDPI	Dots Per Inch. Stores dots per inch setting of the digitizer used to produce the file, such as "300".	RIFF1991
IENG	Engineer. Stores the name of the engineer who worked on the file. If there are multiple engineers, separate the names by a semicolon and a blank. For example, "Smith, John; Adams, Joe".	RIFF1991
ISMP	SMPTE time code of digitization start point expressed as a NULL terminated text string "HH:MM:SS.FF". If performing MCI capture in AVICAP, this chunk will be automatically set based on the MCI start time.	RIFF1994
IDIT	Digitization Time. Specifies the time and date that digitization commenced. The digitization time is contained in an ASCII string which contains exactly 26 characters and is in the format "Wed Jan 02 02:03:55 1990\n\0". The ctime(), asctime(), functions can be used to create strings in this format. This chunk is automatically added to the capture file based on the current system time at the moment capture is initiated.	RIFF1994

Learning References

Specification